摘要：

铝镁合金是当前应用广泛的轻质金属材料，涵盖了汽车、航空航天等多个领域。铝镁合金及制品的生产加工过程会产生高乳化度、高悬浮物（SS）的含油废水，难以直接采用生物方法处理。针对上述问题，经过“隔油调节-破乳-气浮-Fenton氧化-混凝沉淀-A/O/O-砂滤-活性炭过滤”物化与生化耦合工艺处理轻质金属加工废水。在传统物化工艺上引入Fenton氧化，有效提升了废水的可生化性，再通过A/O/O生化处理，处理后废水COD去除率达98.7%，悬浮物去除率达97.3%，出水水质达到《城市污水再生利用 工业用水水质》（GB/T 19923—2005）中回用水标准，且系统能长期稳定运行，具有良好的经济和环境效益。

关键词: 铝镁合金, 金属加工废水, Fenton氧化, 组合工艺

Abstract:

Aluminum-magnesium alloys are widely used lightweight metal materials, covering multiple fields such as automobiles, and aerospace. The production processing of aluminum-magnesium alloys and their products can generate oily wastewater with high emulsification and suspended solids(SS), which is difficult to be treated directly by biological methods. To solve this problem, a physicochemical and biological coupling treatment process of including oil separation and regulation-demulsification-floatation-Fenton oxidation-coagulation precipitation-A/O/O-sand filtration-activated carbon filtration, was adopted to treat the wastewater from the magnesium-aluminum lightweight metal processing. The results showed that this combined process effectively improved the biodegradability of wastewater by introducing Fenton oxidation combined with the A/O/O system on the basis of traditional pretreatment. The COD removal rate reached 98.7%,and the suspended solids removal rate reached 97.3%, and the effluent quality met the reclaimed water standards stipulated in GB/T 19923—2005 Industrial Water Quality for Urban Wastewater Reuse. The system can ensure long-term stable operation and has good economic and environmental benefits.

Key words: aluminum-magnesium alloy, metal processing wastewater, Fenton oxidation, combined process

中图分类号: 

• X703